Thermoelectric generators



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76. A THERMOELECTIC GENERATOR ELEMENT CONSISTING ESSENTIALLY OF AN ALLOY OF LEAD AND A TELLURIM-SELENIUM CONSTITUENT IN RELATIVE PROPORTIONS WITH RESPECT TO EACH OTHER IN THE AREA DEFINED BY SOLID LINES AB, BD, DF AND CA IN THE ACCOMPANYING DIGRAM OF FIGURE 1, AND A THIRD ELEMENT-PROMOTER IN AMOUNT NOT IN EXCESS OF FROM 1.2% TO 2.5% BY WEIGHT EFFECTIVE TO MODIFY THE CONDUCTIVITY OF THE ALLOY. 